Dipping machine



May 15, 1923.

B. M. GRIFFITH DI PPI NG MACHINE Filed Dec. 2, 1921 .2 Sheets-Sheet .l

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B. M. GRIFFITH DIPPI NG MACHINE Filed Dec. 2, 1921 I2 Sheets-Sheet 2 am... /L L QM. .QF m.; WN NN M.\ mwN IN M Nw L NN m, m QN l t NN N -G a@ Sm Q Nw o c w o. N WN Y %N N QW INVENToR 1! M- f Patented May 1.5, 1923 u NiTED' STATES BENJAMIN 1u. -GRIIIITII, or PITTSBURGH, PENNSYLVANIA, AssIGNoEILT f GASKET COMPANY, or PITTSBURGH, PENNSYLVANIA-,

YORK.

Appucann meaneember 2, 1921. serial No. 519,424.

To allwkomz'tmwyooncem.

Be it known that I, BENJAMIN M. ,GRIF- FITH, a citizen of the United States, residing at Pittsburgh, in the county of Allel 5 'gheny' and State of Pennsylvania, have in5- venteda new and useful Improvement in DippingMachines, of which thel following is a full, clear, and exact description.

v'.lfhe present invention relates to dipping 'machines, and more particularly to dipping machines in which the articles to be dipped are carried continuously by a conveyor and immersed thereby in a dipping tank. rljhe articles are held by holders mounted on the conveyors'and arranged so that as the-conveyor passes the tank the holder turns to immerse the article in the dipping tank and then withdraw it. The articles after being dippedare dried.' i In the drawings which illustrate the ferred embodiment of the inventionsy Figure 1 is a plan view'of the dipping apparat'us, a horizontal vsection being shown through the casing which surrounds it; .25

Figure 2 is a perspective view of the dippin tank; Y

1gure3 is a detail view showing the track at thedipping station; f Figure 4 is a side elevation, taken partly in section along the line IV-IV of Figure 3, showing one of the holders;

Figure 5 is a detail view 'of part'of a holder; l 4 Fi re 6 is va section alongthe line VI'. of Figure 3;

v Figure 7 vis a sectionv along1 theV line VUT-VII `ofFigure 3; and

re 8 is a section along vthe line F1 VIIlg-ll-VIH of Figure 4. v v Referring to the illustratedembodiment of thev invention, the dipping vme'clflanism lcomprisesan endless chain 1` having a plurality of'holders 2 'carried' thereby 7'for'holding the articles tobe dipped, in the-illustrated case such articles beingrhollow metal rods 3. The chain carries'fthe` articles continuously pasta'dipping tank 4 which contains the -coating material, such as lacquer. L As the chain passesthe tank, the holders operate to turn the rods 3 from vertical to horizontal position, at the same time-lowering them into the dipping tank 4, and then raising them. The mechanism is enclosed in a casing 5 which heated, preferablyby pre'- ATENT 'DIPPING MACHINE.

steam coils (not shown) in order to dryl the coated articles.. l 5H The casing 5 has an vopeningli4 through which the articles lmaybel'alace'd upon the holders and removed by the fworkman. Llt has a door 7 through'whichaccessniayebe had to the dipping tank 4l. A partition 8'eX'-l tending longitudinally alongthe fcasing di# vides it into two partsmThe-chainl iscar ried on sprocket wheels' 9.at' the end-'ofi the partition v8. The rcha-infis continuously driven by a power driven1sl1aft10 gearedto f one of the sprocket wheels 9?; Extending aroundithepath of travel of the chain,*is a track 1'1.` which is'made of angle iron'fiorsubstantially its entire length except `at thedi pin station'.v At l 'the di in station this trzk is cutaway, as indilite artf12v in Figures 3 and 7,' to allow-,the holderstoturn and dip the articles in thedippi'ngtank'. z Each holder, which isfv indicated generally lby the*` reference numeral 2, comprises an upstanding y'pin' 13, which venters'thejinterior of-one'of thevhollowlrods 8. f The pin 13'is made ofv two' plates of metal laand.-` 13b, welded together.vr [The 'pin '13v fits inajsocket" 30. The excess lacquer in the 'hollow rods 3 is thereby permitted Y to runl past the" -p'in '-13 throughl the socket andescape through the unobstructed socket 30. 4The pin 13 is car-l ried on a jointed arm' 14, comprising the two parts 15' and 16-which are pivotedfatl'nfAs" shown in the drawings, everyl fourth link of the chain is provided with-anintegral up! standinggpiny 18, over 'which vfits-the portion" 16 of theholder arm.' The dconnection between the partl and the pin-*1 8is arigid connection. During vthe major-portion of the travel ofthe conveyor chain'the arm 14 is held straight in' -the',y full? linek '1 position shownffin Figure 4..l When the'cut away por'- tion i12-fof. the track isy reached,v however, {thev section 1 5 of theVarmr is allowed yftov'drop about the f pivot pin 17; This turns the bar 3, toA be coated from the verticali to afhorii.,

zont'al position,` and at the ysaine time 'drops it into the dipping tank 4. As can readily be seen, the part 15 pivoting around the pin of the piece 1 5. A stop 19 on the part 16.

limits' the downward movement of the partA .17 causes the end which holds the rod to 15, so that it does-notswing beyond the ver` tical. A roller 2O is carried on the shaft of the part 15 so that it rides easily along the track.

The track 11 for the greater part of its distance consists in an angle iron, as shown at the two ends of Figure 3. At the dipping station, the track is formed by'a plate 40, having an upcurved front edge 41, along which the rollers 20 travel. This curved edge is cut away at 12, as shown in Figures 3, 6 and 7, to allow the rod-holding arms to turn and immerse-the rods in the dipping tank. An upstanding flange 42 is secured to the plate 40, and serves to support the part 16 of the holder arm when the pivoted part 15 falls to immerse the rods in the tank.

The operation of the device is as follows, described with. particular vreference to coating hollow metal bars as shown in the drawing, withv lacquer. These bars are used in the casket industry. They are first washed and then placed by the workman through the door 6 and on thepins 13. The chain is continuously traveling-,and carries the prepared rods to the left, as shown at lthe top of Figure 1. The rods are thoroughly dried by the heat in the casing 7 before they arrive at the dipping station. VVhema holder ar; y

Iives at the cut-away portion 12 of the track, the roller 2() rides down into such cutfa'way portion, turning the bar'around an axis parallel to the travel of the'chain, and at the same time lowering it so that the bar is inimersed in the lacquer tank 14. It is immediately withdrawn by the travel of the roller 2O out of the depression 12 and up on to the travel. The bars then travel along the extension 21 ofthe dipping tank into which they dip'. The coating is subjected to the drying heat in the casing, so that by the time the bars again reach the opening 6, they are thoroughly dried. They are then removed from the holders by the workman.

It ispto be understood that .the present invention is not limited to its illustrated embodiment or limited to operation upon the specific articles herein shown, but that the invention may be otherwise embodied within the scope of the following claims. I claim:

1. A machine for dipping articles, comprising a dipping tank, a conveyor, holders on the conveyor for the article to be dipped, and means for Iturning the holders about an axis parallel to the travel of the conveyor to immerse the articles in the dipping tank, substantially as described.

2. A machine for dipping articles, comprising a dipping tank, a conveyor, a holder secured to the conveyor 4for holding the articles to be dipped, said holder comprising a pivoted arm, and a track on whichthe pivoted arm rides having a cut-away portion at the dipping station whereby thel arm is allowed to fall and immerse the articles in the dipping tank, substantially as described.

3. A machine for dipping articles, comprising a dipping tank, a conveyor, holders on the conveyor for the articles to be dipped, having pivoted arms, and means for turning the pivoted arms of the holders at the dipping station to immerse the articles in the dipping tank, substantially as described.

4. A machine for dipping articles, comprising a dipping tank, a conveyor, holders on the conveyor for the articles to be dipped, comprising arms for. holding at their ends the articles to be dipped and pivoted so as to both turn and lower the articles to be dipped, and means at the dipping station for causing the pivoted arms to turn and there- `by dip the articles in the dipping tank, substantially asv described.

.5. A machine for dipping articles, comprismg -a dipping tank, an endless chain,

holders for the articles to bel dipped, each holder comprising a partxed to the chain and a second part pivote'd thereto and carrying at its end the article to be dipped, a track extending alongthe path of the chain and serving to support the pivoted arms except at the dipping station, said track being cut away at the dipping station to allow the arms to fall and immerse the articles in the dipping tank,- substantially as described.

6. A machine for dipping rods, comprising a dipping tank, a conveyor, holders on the conveyor, each holder comprising a part fixed to the conveyor and an arm pivoted .theretov and arranged to normally-hold the rod in a vertical position, and means at the dipping station for causing the pivoted part of the holder to drop and to turn therod into a horizontal position and immerse it in the dipping tank, and thereafter to withdraw it from the dipping tank and turn it to an upright position, substantially as de scribed.4

7. A machine for dipping articles, comprising a dipping tank, a conveyor chain, holders on the chain for the artlcles to be dipped, and means for turning the holders at the dipping station so as to immerse the articles in the dipping tank, substantially as described.

I n testimony whereof I have hereunto set myhand.` i

BENJAMIN M. GRIFFITH. j 

